The tax rate you pay depends on whether you are a tax resident or non-resident in Singapore. The following income tax rates apply to tax residents, which includes Singapore citizens, permanent residents, or foreigners who have completed 183+ days of work in Singapore that tax year:
As you can see, personal income tax rates get progressively higher as you earn more, up to a "marginal rate" of 22%. The marginal rate doesn't refer to what you pay on everything you earn, but to the highest band of income that you earn.
For example, if you earn $190,000 a year, your tax band is a marginal rate of 18% (see table above), but you only pay that rate on the $30,000 you earned above $160k, in other words, $30,000 * 18% = $5,400.
This would be added to the $13,950 you pay on the first $160,000 you earned, for a total tax bill (excluding other deductions) of $19,350 or just 10.18% of your annual gross pay.
Roughly 80% of all personal income tax collected comes from the top 10% of taxpayers.
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